One of the harder parts of getting my books ready for the shelf was coming up with a good blurb for the back of the book. I am still experimenting with different ideas. You want to entice the reader to pick up the book. A good cover certainly helps but once they flip the book over or scroll down to the description there has to be something there that convinces them to buy your book. A simple plot summary won’t cut it, nor will over the top hyperbole. Somewhere in the middle is the sweet spot and with some effort you will find the right combination.
To that end there are many articles online to guide you I came across this article from the Savvy Book Marketer and found many of the points very useful.